... of heat and electricity. The metal is renowned for its resistance, as the metal powder, is in the production of electronic components, ... to form a protective oxide surface layer, using tantalum powder, pressed into a pellet shape, as one "plate" ... arc melt, or both, R05400, unalloyed tantalum, powder-metallurgy consolidation, R05255, tantalum alloy, 90 % tantalum 10 % tungsten, electron-beam furnace ...